Targeting an early spring release, "Left 4 Dead 2: The Passing" will include new co-operative campaign and associated narrative and new arenas for Survival, Versus and Scavenge modes, and introduce a new co-operative challenge mode.

Targeting an early spring release, "Left 4 Dead 2: The Passing" will include new co-operative campaign and associated narrative and new arenas for Survival, Versus and Scavenge modes, and introduce a new co-operative challenge mode. 2

Targeting an early spring release, Left 4 Dead 2: The Passing will include new co-operative campaign and associated narrative and new arenas for Survival, Versus and Scavenge modes, and introduce a new co-operative challenge mode. 2